BtVS watching: now again

I am listening the sqeees and non-squees about new and old TV shows, but what about myself?

I am watching the season 1 of BtVS - again, but this time with the husband.

He laughs, he wonders about Slayer's bosom, and he has a question. I am not qualified to answer since I am not North American.

So I am posting it here. Indulge me. ;)

How the dating patterns in this TV show correspond with the dating patterns in North America?

(We've just finished Never kill a Boy on the First Date)